STUDY OF INDUCED COMPACTION BY WHEEL TRAFFIC ON SOIL STRENGTH IN SAMARU, NIGERIA

Publication Date : 01/08/2010


Author(s) :

ATTANDA, M.L..


Volume/Issue :
Volume 5
,
Issue 2
(08 - 2010)



Abstract :

On-farm research and laboratory evaluations to study induced compaction by wheel traffic on the strength of soil were conducted. Four levels of induced wheel traffic of a Steyr 768 model tractor; (zero wheel traffic, two wheel traffic passes, five wheel traffic passes and ten wheel traffic passes) were used in the study. Triaxial test of shear strain on soil sample of the simulated plots at different moisture contents (9%, 11%, 15% and 18% w/w) showed that soil compaction is a function of both the applied compressive stress and the cell pressure (shear strain). At a soil surface of 0-10cm depth, compressive stresses of 130,134 and 153 kN/m2, corresponding to cell pressures of 103, 206 and 310 kN/m2 produced compaction of 2.61, 2.79 and 2.82 MPa respectively. Soil moisture contents of 18%, 16% and 14% w/w which correspond to soil strength of 2.14, 2.2 and 2.36 mg/m3 showed a linear relationship between soil strength and moisture content.


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